Pulley-type metallic microring surface plasmon polariton sensor based on Otto-configuration

Chu En Lin, Chii Chang Chen, Jia Hao Liu, Ya Ru Chang, Alexis Fischer, Islam Laadjal

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


In this study, we design a compact sensor with high sensitivity for refractive index change. A pulley-type metallic microring to produce surface plasmon polariton is proposed. The light is coupled onto the metallic microring using a dielectric waveguide. The 2-D finite-difference time-domain method is used to determine the optimal radius of the metallic microring. We also investigate the relation between the radius of the metallic microring and the sensitivity of the refractive index change. The highest sensitivity of 602.69 nm/RIU can be obtained at the resonance wavelength of 1536.7 nm.

Original languageEnglish
Pages (from-to)1980-1983
Number of pages4
JournalResults in Physics
StatePublished - Mar 2019


  • Ring resonator
  • Sensor
  • Surface plasmon polariton


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